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17 lines
415 B
17 lines
415 B
# frozen_string_literal: true
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module ImageUtils
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module_function
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def blank?(image)
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min = (0...image.bands).map { |i| image.stats.getpoint(0, i)[0] }
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max = (0...image.bands).map { |i| image.stats.getpoint(1, i)[0] }
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return true if min.all?(255) && max.all?(255)
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return true if min.all?(0) && max.all?(0)
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return true if min.length >= 4 && min[-1].zero? && max[-1].zero?
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false
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end
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end
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